Why does the Tiida's engine make loud noises when accelerating?

[Linda]

Here are the reasons why the Tiida's engine makes loud noises when the accelerator is pressed: 1. Too much engine oil, which increases the instantaneous working resistance of the engine, increases the rotational resistance of the crankshaft, reduces the engine's output power, and causes excess oil to enter the combustion chamber and participate in combustion. The result is that the vehicle burns oil, emits blue smoke, and increases fuel consumption. 2. The wrong type of engine oil. When changing the oil, be sure to go to a reputable shop and use genuine oil. Counterfeit or inferior oil can cause significant damage to the engine. Use the oil type recommended in the maintenance manual. 3. Engine overheating causes the engine to lose power. If the engine operates for a long time, causing the surface to overheat, the cooling system may fail. The first thing to do is to check the cooling system. If there is a problem with the cooling system, it may cause exhaust blockage, as the vacuum tube may break. At this time, steam or hot air may escape from the engine, resulting in some loud noises. 4. Internal engine problems, such as valve blockage, etc. The specific cause needs to be determined through inspection.

[McIsabella]

When I was driving my Tiida, the engine noise suddenly became louder after stepping on the accelerator. I guess this is quite common, but it shouldn't be ignored. It could be an issue with the exhaust system, such as cracks or leaks in the exhaust pipe or muffler. When these parts age, gas leakage can amplify the engine roar, making it sound like it's roaring. Another possibility is carbon buildup in the intake system clogging the air filter, causing the engine to need more air but not being able to draw it in, resulting in increased load and a harsh noise. Insufficient or dirty engine oil can also affect engine lubrication, increasing friction during piston movement and making the engine noisier during acceleration. I recommend first checking the oil dipstick to see if the oil level is in the middle. If it's normal, then take it to a repair shop to use professional tools to inspect the exhaust pipe and filter. Regular maintenance and timely oil changes can prevent these issues early, making driving more reassuring.

[DiJeremiah]

The high engine noise when accelerating the Tiida might involve several minor mechanical issues. One could be a problem with the ignition system, such as worn spark plugs or aging high-voltage wires, causing uneven ignition and an imbalanced engine load, resulting in noticeable vibration and noise during acceleration. Another possibility is wear and tear inside the engine, like the valves or piston rings, where increased gaps lead to louder noises, especially noticeable when climbing hills or accelerating at high speeds. A dirty mass airflow sensor can also misjudge the air intake, making the engine run unevenly and produce roaring sounds. I've encountered a similar situation before and tried cleaning the sensor connector myself, which did reduce the noise somewhat. However, if the problem persists, it's best not to delay and take it to a 4S shop for a comprehensive diagnostic scan to pinpoint the fault.